Module: EventHub::Configuration

Extended by:
Configuration, Helper
Included in:
Configuration
Defined in:
lib/eventhub/configuration.rb

Overview

Configuraiton module

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helper

create_bunny_connection, get_name_from_class, now_stamp, stringify_keys

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *_args, &_block) ⇒ Object 



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# File 'lib/eventhub/configuration.rb', line 110

def method_missing(name, *_args, &_block)
  @config_data[name.to_sym] ||
    fail(NoMethodError, "unknown configuration [#{name}]", caller)
end

Instance Attribute Details

#config_data ⇒ Object (readonly)

data from configuration file



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# File 'lib/eventhub/configuration.rb', line 13

def config_data
  @config_data
end

#config_file ⇒ Object (readonly)

name of configuration file



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# File 'lib/eventhub/configuration.rb', line 12

def config_file
  @config_file
end

#detached ⇒ Object (readonly)

run processor run as a daemon



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# File 'lib/eventhub/configuration.rb', line 11

def detached
  @detached
end

#environment ⇒ Object (readonly)

environment the processor is running



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# File 'lib/eventhub/configuration.rb', line 10

def environment
  @environment
end

#name ⇒ Object

name of processor



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# File 'lib/eventhub/configuration.rb', line 9

def name
  @name
end

Instance Method Details

#data ⇒ Object 



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# File 'lib/eventhub/configuration.rb', line 150

def data
  warn "[DEPRECATION] `data` is deprecated. Please use new configuration" \
       " access method."
  stringify_keys(@config_data)
end

#deep_merge!(target, data) ⇒ Object

Deep merging of hashes deep_merge by Stefan Rusterholz, see www.ruby-forum.com/topic/142809



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# File 'lib/eventhub/configuration.rb', line 102

def deep_merge!(target, data)
  return if data.nil?
  merger = proc do |_, v1, v2|
    (v1.is_a?(Hash) && v2.is_a?(Hash)) ? v1.merge(v2, &merger) : v2
  end
  target.merge! data, &merger
end

#default_configuration ⇒ Object 



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# File 'lib/eventhub/configuration.rb', line 120

def default_configuration
  {
    server: {
      user: "guest",
      password: "guest",
      host: "localhost",
      vhost: "event_hub",
      port: 5672,
      tls: false,
      tls_cert: nil,
      tls_key: nil,
      tls_ca_certificates: [],
      verify_peer: false,
      show_bunny_logs: false
    },
    processor: {
      heartbeat_cycle_in_s: 300,
      watchdog_cycle_in_s: 60,
      restart_in_s: 15,
      listener_queues: [@name]
    }
  }
end

#instance ⇒ Object 



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# File 'lib/eventhub/configuration.rb', line 144

def instance
  warn "[DEPRECATION] `instance` is deprecated. Please use new" \
       " configuration access method."
  self
end

#load!(args = {}) ⇒ Object

load configuration from file



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# File 'lib/eventhub/configuration.rb', line 64

def load!(args = {})
  # for better rspec testing
  @config_file = args[:config_file] if args[:config_file]
  @environment = args[:environment] if args[:environment]

  new_data = {}
  begin
    new_data = JSON.parse(File.read(@config_file), symbolize_names: true)
  rescue => e
    EventHub.logger.warn("Exception while loading configuration file: #{e}")
    EventHub.logger.info("Using default configuration values")
  end

  deep_merge!(@config_data, default_configuration)
  new_data = new_data[@environment.to_sym]
  deep_merge!(@config_data, new_data)
end

#load_more!(args = {}) ⇒ Object

load and merge more configuration files



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# File 'lib/eventhub/configuration.rb', line 83

def load_more!(args = {})
  return unless args[:pattern]

  Dir.glob(args[:pattern]).each do |name|
    next if File.directory?(name)

    begin
      EventHub.logger.info("About to load file [#{name}]...")
      new_data = JSON.parse(File.read(name), symbolize_names: true)
      new_data = new_data[@environment.to_sym]
      deep_merge!(@config_data, new_data)
    rescue => e
      EventHub.logger.warn("Exception while loading file [#{name}]: #{e}")
    end
  end
end

#parse_options(argv = ARGV) ⇒ Object

parse options from argument list



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# File 'lib/eventhub/configuration.rb', line 35

def parse_options(argv = ARGV)
  @config_file = File.join(Dir.getwd, "config", "#{@name}.json")

  OptionParser.new { |opts|
    note = "Define environment"
    opts.on("-e", "--environment ENVIRONMENT", note) do |environment|
      @environment = environment
    end

    opts.on("-d", "--detached", "Run processor detached as a daemon") do
      @detached = true
    end

    note = "Define configuration file"
    opts.on("-c", "--config CONFIG", note) do |config|
      @config_file = config
    end
  }.parse!(argv)

  true
rescue OptionParser::InvalidOption => e
  EventHub.logger.warn("Argument Parsing: #{e}")
  false
rescue OptionParser::MissingArgument => e
  EventHub.logger.warn("Argument Parsing: #{e}")
  false
end

#reset ⇒ Object 



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# File 'lib/eventhub/configuration.rb', line 26

def reset
  @name = "undefined"
  @environment = "development"
  @detached = false
  @config_file = File.join(Dir.getwd, "config", "#{@name}.json")
  @config_data = {}
end

#respond_to_missing?(name, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/eventhub/configuration.rb', line 115

def respond_to_missing?(name, include_private = false)
  return true if @config_data[name.to_sym]
  false
end